Here is the full list of all 24 Castles achievements worth 1,000 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox One.
Make 100 repoker
Defeat 20 comrades on VS Mode
Break 50 blocks with the hammer
Kill your partner 20 times with the hammer
Kill your buddy with dinamite
Set 50 dinamite barrels
Defeat the Gyrocopter
End a match without completing any challenge
Play a game on VS Mode
Send a Repoker to your rival on VS Mode
Get to 5 minutes on Survival Mode
Break a block of each with the hammer
Break 9 blocks with the same dinamite
Kill yourself with dinamite
Defeat the Moleman
Get to 2 minutes on Survival Mode
Make a 5 blocks combination
Defeat the Twins
Defeat the Titan
Defeat the Spider
Defeat the Girocopter with a Repoker
Get to 7 minutes on Survival Mode
Finish the Story Mode
End a VS match with a Speed bar full and the other empty